react app

react-app/node_modules/babel-plugin-transform-react-jsx-source/lib/index.js

@@ -0,0 +1,57 @@
+
+/**
+* This adds {fileName, lineNumber} annotations to React component definitions
+* and to jsx tag literals.
+*
+*
+* == JSX Literals ==
+*
+* <sometag />
+*
+* becomes:
+*
+* var __jsxFileName = 'this/file.js';
+* <sometag __source={{fileName: __jsxFileName, lineNumber: 10}}/>
+*/
+
+"use strict";
+
+exports.__esModule = true;
+var TRACE_ID = "__source";
+var FILE_NAME_VAR = "_jsxFileName";
+
+exports["default"] = function (_ref) {
+  var t = _ref.types;
+
+  function makeTrace(fileNameIdentifier, lineNumber) {
+    var fileLineLiteral = lineNumber != null ? t.numericLiteral(lineNumber) : t.nullLiteral();
+    var fileNameProperty = t.objectProperty(t.identifier("fileName"), fileNameIdentifier);
+    var lineNumberProperty = t.objectProperty(t.identifier("lineNumber"), fileLineLiteral);
+    return t.objectExpression([fileNameProperty, lineNumberProperty]);
+  }
+
+  var visitor = {
+    JSXOpeningElement: function JSXOpeningElement(path, state) {
+      if (!state.fileNameIdentifier) {
+        var fileName = state.file.log.filename !== "unknown" ? state.file.log.filename : null;
+
+        var fileNameIdentifier = path.scope.generateUidIdentifier(FILE_NAME_VAR);
+        path.hub.file.scope.push({ id: fileNameIdentifier, init: t.stringLiteral(fileName) });
+        state.fileNameIdentifier = fileNameIdentifier;
+      }
+
+      var id = t.jSXIdentifier(TRACE_ID);
+      var location = path.container.openingElement.loc; // undefined for generated elements
+      if (location) {
+        var trace = makeTrace(state.fileNameIdentifier, location.start.line);
+        path.container.openingElement.attributes.push(t.jSXAttribute(id, t.jSXExpressionContainer(trace)));
+      }
+    }
+  };
+
+  return {
+    visitor: visitor
+  };
+};
+
+module.exports = exports["default"];